18-219 - Crimp Socket Pin Electrical Contact

18-219 – Textron Aviation OEM Crimp Socket Contact

Available now on the Airparts.aero Marketplace.

The Textron Aviation 18-219 is a high-reliability, flight-critical crimp socket contact engineered by Applied Avionics (Vivisun) and distributed under Textron Aviation oversight. This precision electrical interface is designed for integration into aircraft control panels, lighted switch matrices, cockpit annunciator displays, and secondary avionics wiring looms. Built to match or exceed strict military standard metrics—cross-referencing to AS39029 specifications—the 18-219 ensures low-resistance signal conduction and absolute data transmission clarity for systems exposed to continuous inflight airframe harmonic vibration.

Precision-machined from a high-conductivity copper alloy matrix, the 18-219 features a gold-plated finish over an underplate layer. This surface treatment prevents oxidation, limits insertion-wear degradation, and completely eliminates the risk of galvanic corrosion when installed in non-pressurized electronics bays or high-humidity environmental zones. Designed as a Size 20 mating end and Size 20 wire barrel, this rear-release socket accommodates standard stranded aerospace-grade wire sizes. It features color-coded bands (Brown, White, Red) that provide direct, error-free visual confirmation of the contact's standard specification footprint during bench assembly or flight-line maintenance.

The Textron Aviation 18-219 represents the gold standard for high-density, small-signal interconnect components. Its closed-entry socket entry design incorporates an internal metal retention clip or shroud to safeguard the contact from damage caused by oversized test probes or misaligned pins during blind-mating operations. For repair facilities, completion centers, and avionics technicians executing complex glass-cockpit retrofits or power grid remediation, sourcing this genuine OEM contact guarantees complete wire loom integrity and long-term compliance with original type-certificate data criteria.

Key Features

• Premium Gold-Plated Finish: Enhances surface conductivity and completely isolates the baseline copper alloy from atmospheric oxidation or fretting corrosion.

• Closed-Entry Pocket Geometry: Eliminates pin stubbing and structural damage caused by out-of-tolerance mating components or incorrect test probe insertions.

• Rigid Copper Alloy Base Matrix: Formulated to combine high mechanical tensile strength with low structural resistance, reducing localized voltage drops.

• Standard Size 20/20 Footprint: Engineered to strip, seat, and compress uniformly using standard, industry-wide military specification crimp tools.

• Color-Coded Identification Bands: Features precise Brown, White, and Red banding lines to simplify part verification, reducing human error in busy avionics shops.

Technical Specifications

• Part Number: 18-219 (Cross-Reference: Applied Avionics 18-219 / M39029/22-192 equivalent metrics)

• Component Type: Rear-Release Crimp Socket Contact

• OEM Cataloguer: Textron Aviation (Hawker Beechcraft)

• Primary Manufacturer: Applied Avionics, Inc. (Vivisun)

• Mating End Size: Size 20

• Wire Barrel Size: Size 20

• Wire Range Accommodation: 20 to 24 AWG typical (Stranded copper aerospace wire)

• Color Identification Bands: Brown, White, Red

• Material Composition: High-Conductivity Copper Alloy Substrate

• Finish Protection: Gold Plating over Nickel Underplate (per MIL-G-45204 or equivalent)

• Component Weight: 0.005 lbs (0.002 kg)

• Nominal Envelope Dimensions: 0.35 (L) x 0.1 (W) x 0.1 (H) Inches

• Packaged Dimensions: 4.25 (L) x 2.9 (W) x 0.25 (H) Inches

• ECCN: 9A991.d

• Certification Status: Airworthiness Release Eligible (FAA Form 8130-3 / EASA Form 1 Traceability)

Aircraft Compatibility

• Beechcraft King Air Family: King Air 90, 200, 300, and 350 Series platforms (Switch panels and flight deck consoles).

• Cessna Citation Fleet: Multi-engine business jet platforms utilizing Vivisun/Applied Avionics backlit switch matrices.

• Hawker Mid-Size Series: Hawker 750, 800XP, 850XP, and 900XP system arrays.

• Note: Final configuration control and part effectivity mapping must be validated exclusively by referencing the target tail-number's specific Illustrated Parts Catalog (IPC) or Wiring Diagram Manual (WDM).

Applications

• Cockpit Push-Button Interfacing: Establishes the core terminal connection inside flight deck master warning panels, fuel control selectors, and landing gear configurations.

• Avionics System Sub-Wiring: Provides high-density signal distribution inside multi-pin rectangular and circular bulkhead connectors.

Why Choose 18-219?

Sourcing a trace-certified OEM Textron 18-219 crimp socket prevents intermittent signal dropouts and high-resistance faults common to non-certified or consumer-grade pin interfaces. Low-tier commercial contacts often use cheap brass alloys and thin flash-gold platings that degrade or crack under continuous airframe vibrational resonance. This breakdown results in micro-arcing, wire insulation damage, and false system warnings on flight control displays. The 18-219 features an optimized core grain structure that forms a true gas-tight cold-weld connection when compressed, ensuring stable power delivery across critical cockpit indicator paths.

The electrical functionality of the Textron Aviation 18-219 crimp socket turns on the principles of plastic deformation cold-welding and low-boundary contact resistance dynamics. When an aerospace wire is compressed inside the size 20 wire barrel using a precision multi-indent tool, the applied pressure forces the copper alloy barrel and the internal wire strands to flow beyond their elastic limits. This action eliminates all microscopic air boundaries to establish a completely gas-tight interface that prevents intergranular oxidation.

Concurrently, the contact's gold-plated surface provides an excellent work function rating. This metallurgy maintains minimal signal attenuation across low-amperage logic circuits, while the internal stainless steel or copper alloy shroud provides a reliable spring force that maximizes physical contact area against the entering male pin. This structural configuration mitigates micro-fretting corrosion under continuous harmonic airframe vibration profiles, preserving signal integrity across high-altitude decompression drops.

Note: The Textron Aviation 18-219 is a high-precision electrical component. Under-crimping, over-crimping, or utilizing uncalibrated hand tools will compromise the gas-tight seal, causing immediate wire separation, micro-arcing, or total logic path dropouts. Contact termination, pinning extraction, and harness continuity validation must be executed exclusively by a certified A&P/Avionics technician in strict compliance with the aircraft's Wiring Diagram Manual (WDM) and FAA Advisory Circular AC 43.13-1B Chapter 11. Always employ the specified M22520/1-01 or M22520/2-01 crimp frames with the appropriate turret positioner tool, and use the correct plastic or metal M81969 extraction tool to avoid destroying the internal connector retention tines.

Documentation

• Applied Avionics Technical Interconnect and Switch Component Catalog

• FAA Advisory Circular AC 43.13-1B: Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair (Chapter 11: Aircraft Electrical Systems)

• SAE AS39029 Performance Specification for Electrical Contacts